GRAFTON, Ill. (CBS/AP)-- The Mississippi River is topping out at some problematic spots, but there is growing concern that spring floods are far from over.

The river was at or near crest at several places Sunday between the Quad Cities and near St. Louis. Some towns in the approximate 100-mile stretch of river from Quincy, Ill., to Grafton, Ill., reached 10-12 feet above flood stage.

The good news was that most businesses and homes were high and dry, though hundreds of acres of farmland were under water, bridges were closed at Quincy and Louisiana, Mo., and countless roads were shut down.

But river towns aren't yet in the clear: An inch or more of rain is in the forecast as well as continuing accumulation of snow to the north, especially in Minnesota and the Dakotas. Flood watchers along both the Missouri and Mississippi rivers know that once that snow -- record levels in some cases -- melts, a lot of it ends up in the big rivers.

The current flooding is bad enough. In scenic Grafton, a small tourist town 40 miles north of St. Louis, floodwater 3 inches deep seeped into the basement of Pam and Dennis Bick's home, where they've lived for four decades.

"We have time to figure out what to do, where we would go and where we would put everything," Pam Bick, 57, said. "I don't want it to come up any more. But I can't stop it."

The Coast Guard closed a stretch of the Mississippi south of St. Louis after 114 barges broke loose from their moorings late Saturday night, reports CBS St. Louis affiliate KMOV-TV.

The runaway barges were floating freely at the time and posed "immediate danger" to facilities and bridges near St. Louis, the Coast Guard said. All the loose vessels have since been secured, but 11 barges sank, and officials worried they could obstruct traffic on the river's surface, prompting the continued closure, KMOV says.

Separately, the Coast Guard closed the Mississippi River at Vicksburg. Miss. after barges hit a railroad bridge there Sunday and about 30 barges broke free from the towboat "Captain Buck Lay."

Nine towboats -- six bound upriver and three heading downriver -- with a total of 134 barges were waiting to get through Sunday evening, Petty Officer Ryan Tippets said.

Every barge was accounted for, but the river remained closed with no word on when it might reopen. Tippets says three barges carried grain and the rest held coal.

Rain last week started the whole flooding mess, causing the Mississippi and many other rivers to surge in Missouri, Illinois, Iowa, Wisconsin, Michigan and Indiana. Flooding has now been blamed in three deaths -- two at the same spot in Indiana and one in Missouri. In all three cases, vehicles were swept off the road in flash floods.

Spots south of St. Louis aren't expected to crest until late this week, and significant flooding is possible in places like Ste. Genevieve, Mo., Cape Girardeau, Mo., and Cairo, Ill.

Adding to concern is the forecast. National Weather Service meteorologist Julie Phillipson said an inch of rain is likely in many places Monday night into Tuesday, some places could receive more than that.

"That's not what we want to see when we have this kind of flooding, that's for sure," Phillipson said.

In La Grange, Mo., sandbags were holding back the murky Mississippi River water at City Hall, a bank and a handful of threatened homes, and the water was dropping. This flood was little more than an inconvenience, Lewis County emergency management director David Keith said.

"What we're worried about now is all that snow melt in North and South Dakota and Minnesota," Keith said, referencing the state's mounds of April snow.

Forecasters said up to 6 inches of new snow were possible in the Black Hills area of South Dakota through Monday morning. But AccuWeather meteorologist Alan Reppert said it may stay cold long enough to the north to make for a gradual melt. Of greater concern, he said, is the Red River in North Dakota, which could see significant flooding in the coming weeks.

By Sunday, sandbagging had all but stopped in Clarksville, Mo., evidence of the confidence in the makeshift sandbag levee hurriedly erected to protect downtown. The river Sunday was about 10 feet above flood stage and expected to rise another foot before cresting Monday.

In Grand Rapids, Mich., Mayor George Heartwell declared a state of emergency as the flooding Grand River poured into the basements of several hotels and other downtown buildings.

Illinois Gov. Pat Quinn declared at least 41 counties disaster areas from flooding. The Fox River in northern Illinois reached record levels, and several records were possible along the Illinois River.

Indiana officials were still determining if flooded communities like Kokomo, Tipton and Elwood will be eligible for disaster aid.

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